Prime Numbers Practice for 11 Plus
19 October 2026
What is a prime number
A prime number is a whole number greater than 1 that can only be divided by 1 and itself. For example, 2, 3, 5, 7 and 11 are all prime numbers. Understanding this basic definition helps children spot primes quickly in 11+ questions.
Key insight: The number 2 is the only even prime.
Why prime numbers matter for 11+
Prime numbers often appear in 11+ maths papers, both as direct questions and as part of larger problems. Children may be asked to identify primes, explain why a number is not prime, or use primes in factorisation tasks. Practising these skills builds confidence and accuracy.
Common mistakes to avoid
It's easy to forget that 1 is not a prime number, and that 2 is the only even prime. Children sometimes overlook small primes or misidentify composite numbers. Encourage your child to check divisibility by smaller numbers and to practise with a range of examples.
How to practise prime numbers at home
Use short quizzes, flashcards, or worksheets focused on identifying primes and explaining answers. Mix in questions that require spotting non-primes and explaining why. The 11+ Maths: Prime Numbers package offers targeted online practice with instant feedback.
Key insight: Regular, low-pressure practice helps children remember key facts and spot patterns more easily.
